#ifndef __OPENCV_OLD_CV_H__
#define __OPENCV_OLD_CV_H__
-#pragma warning("This is a deprecated opencv header provided for compatibility. Please \
-include a header from a corresponding opencv module")
+#if defined(__GNUC__)
+#warning "This is a deprecated opencv header provided for compatibility. Please include a header from a corresponding opencv module"
+#endif
+
+#if !defined(CV_IMPL)
+#define CV_IMPL extern "C"
+#endif //CV_IMPL
#include "opencv2/core/core_c.h"
#include "opencv2/core/core.hpp"